/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hop.pipeline.transforms.mailinput;

import junit.framework.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import org.mockito.stubbing.Answer;

import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;

import static org.mockito.Matchers.anyInt;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class BatchFolderIteratorName {

  static Folder folder = null;

  @BeforeClass
  public static void setUp() throws MessagingException {
    folder = mock(Folder.class);
    when(folder.getName()).thenReturn("INBOX");
    when(folder.getMessages(anyInt(), anyInt()))
        .thenAnswer(
            (Answer<Message[]>)
                invocation -> {
                  Object[] args = invocation.getArguments();
                  int start = ((Integer) args[0]).intValue();
                  int end = ((Integer) args[1]).intValue();
                  return new Message[end - start + 1];
                });
  }

  @Test
  public void testBatchSize2() {
    BatchFolderIterator bfi = new BatchFolderIterator(folder, 2, 1, 2);
    Assert.assertTrue(bfi.hasNext());
    bfi.next();
    Assert.assertTrue(bfi.hasNext());
    bfi.next();
    Assert.assertFalse(bfi.hasNext());
  }

  @Test
  public void testBatchSize1x2() {
    BatchFolderIterator bfi = new BatchFolderIterator(folder, 1, 1, 2);
    Assert.assertTrue(bfi.hasNext());
    bfi.next();
    Assert.assertTrue(bfi.hasNext());
    bfi.next();
    Assert.assertFalse(bfi.hasNext());
  }

  @Test
  public void testBatchSize1() {
    BatchFolderIterator bfi = new BatchFolderIterator(folder, 1, 1, 1);
    Assert.assertTrue(bfi.hasNext());
    bfi.next();
    Assert.assertFalse(bfi.hasNext());
  }

  @Test
  public void testBatchSize2x2() {
    BatchFolderIterator bfi = new BatchFolderIterator(folder, 2, 1, 4);
    Assert.assertTrue(bfi.hasNext());
    bfi.next();
    Assert.assertTrue(bfi.hasNext());
    bfi.next();
    Assert.assertTrue(bfi.hasNext());
    bfi.next();
    Assert.assertTrue(bfi.hasNext());
    bfi.next();
    Assert.assertFalse(bfi.hasNext());
  }

  @Test
  public void testBatchSize2x3() {
    BatchFolderIterator bfi = new BatchFolderIterator(folder, 2, 1, 5);
    Assert.assertTrue(bfi.hasNext());
    bfi.next();
    Assert.assertTrue(bfi.hasNext());
    bfi.next();
    Assert.assertTrue(bfi.hasNext());
    bfi.next();
    Assert.assertTrue(bfi.hasNext());
    bfi.next();
    Assert.assertTrue(bfi.hasNext());
    bfi.next();
    Assert.assertFalse(bfi.hasNext());
  }
}
